121121220110 has 32 divisors (see below), whose sum is σ = 239297196672. Its totient is φ = 43773864480.

The previous prime is 121121220109. The next prime is 121121220127. The reversal of 121121220110 is 11022121121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3359684 + ... + 3395543.

It is an arithmetic number, because the mean of its divisors is an integer number (7478037396).

Almost surely, 2^121121220110 is an apocalyptic number.

121121220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121220110 is a deficient number, since it is larger than the sum of its proper divisors (118175976562).

121121220110 is a wasteful number, since it uses less digits than its factorization.

121121220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6755408.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121121220110 its reverse (11022121121), we get a palindrome (132143341231).

The spelling of 121121220110 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ten".